function entry() {
    if ((document.entryform.keyword.value.length == 0)
    || (document.entryform.keyword.value == " ")) {
    alert("Primero debe ingresar un producto para buscar.");
    return false;
    }
    and_search = (document.entryform.and_or.selectedIndex == 0?"and":"or");
    if (document.entryform.and_or.selectedIndex == 2)
    and_search = "exact";
    location.href = 'http://www.elmaitenmuebles.com.ar/buscador.php' + "?"
    + escape(document.entryform.keyword.value)
    + (and_search != "or"?"&"+and_search:"");
    return false;
    }